Mining-machine.



. DUNLOP. MINING MACHINE. APPLICATION FILED IULY2B. I9I3. RENEWED OCT.25.1917.

Patented May 28, 1918.

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R. R. DUNLOP. MINING MACHINE. APPLICATION FILED IULY28. 19H: RENEWIEDOCT. Z5. I9I7. www@ lufcui'vd MayZS, 1918.

2 SHEETS-SHEET 2- A TTORN .@NWIII I A@ 0 rr sus ni i :eOnniaT n. DUNLOP,or COLUMBUS, omc, nssicrnon To THE JEFFREY ivinivulractuniue COMPANY, orconm/inns, omo, a CORPORATION.

'MINING-MACHINE Specication of Letters Patent.

Patented May 2d, wild.

Application led .l'uly 28, 1914, Serial No. 853,644. lll-enevvcd ctober25, 1917. 'Serial No. 19,545.

and 'useful .improvements in Mining-Ma-l chines, of which the followingis .a specificationpreference being had thereinto the .accompanyingdrawing. y

The present invention relates especially to mining machines of the classin whicli'eacli is provided with its own track wheels and is adapted toperform the cutting operations while supported on the said track wheels.A machine embodying my invem` tion is adapted to travel into a mine roomalong a central track and, after reaching a suitable position, isadapted to out aA semi circular kerl? into the coal Iatthe face of theroom. y l

lt'is often ldesirable to use such a machineI undesirable, or where alonger face is required than can be made from the pivot point. Insuch-cases the cutting element must be fed into the coal by the bodilymovement of the machine along the track, which, in such cases, is laidat a proper.distance from the coal face to secure tlie desired depth ofcut. As the tractive eli'ort of the propelling wheels zisi-nsuiiicient-to accomplish such feeding, it has been customary toresort to anchors, fl'Xed in, or near,'the coal face, to which a feedcable is attached, the winding up of which draws the machine along thetrack to cutthe coal.

ln earliery machines of the class to` which this invention specificallyrelates a single feed cable was4 provided which was used optionallyeither to swing the cutter mecha anism with respect to the main frame orto move the whole ma :hin'e bodily. This construction caused much lossof time when it was necessary to shift the cable from4 one position tothe other. And even when the cable was in position for feeding themachine bodily itco'uld, without adjustment, move it in one directiononly. Ii' movement in the other direction was desired the cable had tobe moved to another position.

One of the objects of this invention is to provide a means supplementalto and independent of the cable which controls the along the track.Another object is to provide means whereby the machine can be movedbodily along the track in either direction at the will of the operatorand without' the shifting of cables, anchor pins or similar devices.Stated more specifically one of the objects of the invention is toprovide a machine of this general class with a feeding mechanism adaptedto engage a rack rail laid along thetrack. Other objects of theinvention will be apparent from the following specification and claims.

The device by which attain these objects will be hereinafter fully setforth, reference being had to the accompanying drawings of Figure 1 is aIgieilleral plan view of the machines.

Fig. 2 is a side elevation of the machine illustrated in Fig. 1.

Fig. 3 is a fragmentaryplan view'of the several figures.

As illustratedfin the drawingshthismachine comprises a supportingtruck,y adapted to travel over the tracks of the mine, upon sol which ismounted a coal cutting mechanism Mounted upon the truck platform arepower devices by whichthe truck wheels may be having a horizontallyprojecting cutter arm j adapted to berotated about a vertical axis.`

rotated to propel the machine along the 'mine tracks from one workingplace to another, and by which is actuated my improved positive tractiondeviceby which .the machine is driven along the track to force thecutter arm again the coal to cut it.

The truck consists of a structural steel platform l having suitableyaxle boxes in which are journaled the axles 2 and 3` to which are fixedthe track Wheels 4 and 5 adapted to travel Over the rails 6 of the minetracks. Attached to the truck platform f 1 are guide pedestals 7 whichengage the-depending lugs 8 of the supporting ring 9.

lill

Mounted upon` the supporting ring- 9,

.' adapted to rotation about the vertical axis j thereof, is a mainframe plate 10 of the coal cutting element, to which is attached thehorizontally projecting cutter arm 1-1 which is of a type well known inthe art. Suitable means for effecting the vertical adjustment of thesupporting ring 9 are contained in' the. pedestals 7, but as they formno part of the present invention they need not be specificallydescribed. Mounted on the frame plate 10 is a windingdrum 12 upon whichmay be Wound the feed cable 13, the outer end of which may be attachedto projections of the supporting ring to cause the rotation of the coalcutter thereon. A suitable motor 14: is attached to the frame plate ,10and is connected by suitable gearing to actuate the ries a sprocketwheel 20, connected thereto' coal cutter and the winding' drum.

Mounted ou the truck platform 1, atthe rear-of the mechanism abovedescribed, is a motor l5 connected by suitable worm gearing to the crossshaft 16 to drive it. The shaft 16 is supported in bearings 17, 18 and19 attached to the truck platform, and carby a clutch' 21. The sprocketwheel 20 serves, through the chain 22 and sprocket Wheel 23, todi-ivethe axle 2 and Wheels 4 to propel thefmachine from place to place.Mounted 'upon the shaft 16 and connected thereto by aclutch 2i is aneccentric 25 by which my improved positive traction devi'ce'is actuated,as will hereinafter appear.

Pivoted on'the extended. ends of the axle 2 are 'two arms.26.having attheir rearward '.bears at its upper end'againstthe lug 36- caused torotate in either direction/ by theoscillation of the rocker arm'.- Fiydto the ends journal bearings 27 in which are supported the'transverseshaft 28.' Upon the shaft 28 is rotatably mounted la rocker arm 29connected at its upper end to the eccentric rod 30 to be oscillated bythe rotation of the eccentric 25. A ratchet wheel 31 is fixed to theshaft 28, adjacent the rocker arm 29, which is adapted to be engaged-bythe doubledirection pawl 32 pivoted on the pin`33 of the rocker arm..Pivotally connected tothe stem 34.- of the pay'vl 32 is a rod 35 whichis slidable in an aperture of the .lug 36 -of the rockerarm, and whichis surrounded by the eompressio'i'spring 37 which and at its lower endlagainst ,the `stem 34 to hold the pawl in Contact with the ratchetwheel.l lBy this arrangement. the ritt het Wheel 31, and With'it theshaft 28, aybe I shaft 28 to rotate Withv it, is 'a sprocket Wheel 38adapted to engage the r c rail 39 attached to the cross ties 4() of hemine track. Asthe rack rail is secur vly' anchored to the cross ties vitisevident 'at the rota` tion of the ratchet ivheel 31 `jwill cause thetruck,and with it the coal `Jutting mechanism. to move along the' tr ck,the rate of rotation of the shaft28 being suchas to give the desiredrateof feed to the cutter arm.4

A- suitable mechanism is provided for preventing retrograde movement ofthe shaft 28 and the s rocket Wheel 38. One form of mechanism or thispurpose is shown. It comprises a'ratchet wheel 3l on the end Of theshaft 28, and a reversible pavvl '34 mounted on one of the arms 26, andheld in position by means of the rod 35a and the sprlng 37.

Vhen' transporting the machine from place to p lace about the mine', thesprocket ufheel 38 must be lifted so as to clear the track rails atswitches and crossings. Means for lifting the shaft '28 and sprocketwheel.

plv-- oted o n the support 42 of the truck platform 38 are provided inthe hand levers Lt1 1, and connected to the ar'ms 26 by links 43.

Guides 44 areprovided to conne the hand. levers against lateraloscillation, and in`l these guides are apertures -l into which may bethrust suitable pins to hold the'hand levers in eitherposition desired.

Then the machine is to Work on the long wall system the working place isprepared by the laying of the track G parallel with the coal face and ata suitable distance.

when the cutter arm has reached a right angle with they track, the lineof the kerf willq resemble the dotted line 47 in Fig. l. When themachine is thuis fully sumped the truck will be propelled toward theleft hand side of the Working face by the rack rail mechanism. After theentire face has been cut, the sprocket wheel 38 will bc lifted and the`machine proceed to the next place, pro- -I pelled by the traction oft-he wheels 4.'

When using this machine for driving entry the track 6 is laid on thecenter line of the entry, themack rail 39 secured in its place and themachine advanced with the cutterarm 11 rotated to the right till its endis in contact with the rib. The truck is then advanced by the rack railmechanism until the desired depth of cut is effected as in Figo. Thecutter arm is 'then rotated to the left' until its end reaches the lineof the left'hand rib as illustrated in Fig. 7, the

machine is then backed out by means of the rack rail mechanism as shown.in Fig. 8.

' WhatI claim isz' f i 1 In a. System of coal V.mining apparatus 130Leonesa zontal kerf in ka coal face while supported`l on a section oftrack extending longitudinallytoward said face, the combination of atrack, a base frame, track wheels supliti ' base frame and movablelaterally across the from the coal While cutting andiwhile the N arm isfixed relatively to the baseframe andai"y to be moved laterally 'whilecutting, mechaporting the frame, anfelongated horizontally projectingcutter arm carried by the front thereof, endless' chainvcutter devicesmounted to lmove in a horizontal path around the periphery of the cutterarm, the arm and cutter devices being adapted to be thrustibodilyintoand withdrawn bodily nism carried'by the base frame adapted toengage a part of the track structure to posi-y tively feed the'apparatus bodily toward and away from the coal face to thrust thecutter arm into and withdraw it from the coal as aforesaid, mechanismfor swinging the cutter arm laterally, mechanism for driving the track'Wheels to transport the apparatus bodily over the track,-motor devicescarried by the base frame, and means for causing the power/of the motordevices to actuate the said feedin swin invr and track-wheeldrivingmechanisms. l2., 1n a system ofv coal mining. apparatus comprising aground supported track and a portable mechanism adapted to betransported over and remain permanently upon said track and also adaptedto cut a horizontal kerfgin a coal face while supported on a section oftrack extending longitudinally toward said face, the combination of atrack, a base frame, track wheels-supporting the frame, an elongatedhorizontally projecting cutter arm carried by the base frame and movablelaterally across the front t5 thereof, endless chain cutter devicesvmounted to move .in a horizontal path around the periphery of thecutter' arm the arm and cutter devices being adapzed ,to be thrustbodily .into and. withdrawn bodily from the coal while cutting and Whilethe Yarm is fixed relatively to ythe base frame and to be movedlaterally While cutting, mechanism carried by the base frame adapted toengage a part of the track structure to positively feed the apparatusbodily toward and away l from the coal face to' thrust the cutter arminto and withdraw it from the coal as aforesaid, mechanism for swingingthe cutter arm laterally, motor devices carried by the basefjfframe,and. means for causing the power'of the motor devices to actuate thesaid feeding and swinging mechanisms.

3. In a system of coal mining apparatus comprising a ground supportedtrack and a portable mechanism adapted to be transrlaterali into andwithdrawn bodilyv from the coal while cutting and 'while the arm isfixed relatively to the base frame and to be moved while cutting,mechanism carried bythe ase frame adapted to engage a partV ofthe' trackstructure to positively feed the apparatus bodily toward and away fromthe coal face to thrust the cutter arm into and Y withdraw it from the-coal as aforesaid, mechanism for swinging the cutter arm laterally,mechanism for driving the track wheels to transport the apparatus bodilyover the track, manual means carried by the base frame" for 'moving theaforesaid feeding mechanism intoand out of engagement withthecoperatingpart of the track, motor devices carried by the base frame,and manually controllable means for causing the power ofthe motordevices to actuate the said feeding, 'swinging ard 'track-wimpeldrivingmechanisms.`

4. 111- a system of coalmining:apparatus comprising a ground supportedltrack and aportable mechanism adapted to betransported over and remainpermanently upon -said track and also adapted to cut a hori-` zontalkerf in a coal face while Supported on a section of trackextendinglongitudinally toward said face, the combination of a track, a baseframe, track wheels supporting the frame, an elongated horizontallyprojecting cutter arm carried by the base frame and movable laterallyacross the front thereof, endless chain cutter devices mounted to movein a. horizontal pathu around the periphery of the cutter arm, the armand cutter devices being adapted to be thrust bodily into and wit drawn.bodily from the coal while cutting knd while thc arm is fixed relativelyto the base frame and to be moved laterally while cutting, mechanismcarriedA by the base frame adapted to engage a part of the trackstructure to positively feed the apparatus bodily toward and away fromthe coal face to. thrust the cutter arm into and withdraw it. from thecoal asv aforesaid, mechanism for swingaforesaid feeding mechanism intoand out of engagement with the cooperating part of the track,motor'devices carried by the rbase frame, and manually controllable y,mc'ansior causing the power of the motor ldevices to actuate the saidfeeding and swinging mechanisms.

l 5. In a system of coal mining apparatus ing the frame, an elongatedhorizontally. .projecting cutter arm carried by the base rame andmovable laterally across the f frontthereof, endless chain cutterdevices ymounted .-to move in a horizontal path around the periphery ofthe cutter'arm, the arm and cutter devices being adapted to be thrustVbodily into and `Withdrawn bodily y from the coal While cutting andwhile the arm is fixed relatively to thebase frame and to. be novedlaterally while cutting, mechanism ,carried by the base .frame adaptedto engage a part of the track structure to positively feed the apparatusbodily toward and away from the coal face gto thrust the cutter arm intoand withdraw it from the coal as aforesaid, mechanism for swinging thecutter arm lateral-ly, motor devices cary ried bythe base frame, andmanually controllablemeans for causing the power of the motor devices toactuate the said feeding andswinging mechanisms simulta-` neously and'independentlyl of each other, whereby the contour of the kerf can becontrolled at will.

lcomprising a' ground supporte la portable mechanism adapted to betrans- 6. In a-system of coal mini 'apparatus track and ported over andremain permanently upon said track and also adapted to cut ahorizontalkerf ina coal face while supported on a section of trackextending longitudinally toward said face, the combination of a track, abase frame, track .Wheels supporting the frame an elongated horizontallyprojecting cutter arm carried by the base frame and movable laterallyacross the iront thereof, endless chain cutter devices mounted 'to movelin 4a horizontal path around the periphery of the cutter arm, the armand cutter devices being adapted to 'be thrust bodily into` andwithdrawn bodilyl from the foal while cutting and while the arm is fixedrelatively to the base frame and to be moved-laterally while cutting, aracklike member secured stationarily external to the base fra'me,mechanism carried by the base frame adapted to engage theracklike memberto positively feed the apparatus bodily towardland away from the coalface to thrust the cutter arm into and withdraw it from the coal asaforesaid, mechanisin for swingil'lg the cutter arm laterally, motordevices carried by the base frame', and means for causing the power ofthe motor devices to actuate the said feeding and swinging mechanisms.

ture, in presence of two witnesses.

ROBERT R. DUNLOP.

Witnesses: l

Anvm R. ANDERSON,

DUDLEY T. FISHEiz.

'70 In testimony whereof, I affix my signa-

